JPH047300B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a sandwich board, in which a foamable reaction mixture having self-adhesive properties is interposed between two base materials, and at least one of the two base materials is embossed. The present invention relates to an apparatus for continuously manufacturing a sandwich board having a base material. Recently, as interior and exterior materials for buildings, sanderch boards, which are made of a metal plate and have heat insulation, light weight, and rigidity, have been mass-produced. but,
All sandwich boards have a so-called design and three-dimensional feel (embossed pattern) that improves the coldness and smoothness of metal etc.
There are almost no products that are rich in material and have suppressed physical properties (flexibility) of the material. Furthermore, even if they existed, they only had a limited number of colors, thicknesses, and patterns, and in reality they were no more than mere metal composite plates. Furthermore, when a foamable reaction mixture, for example a synthetic resin raw material such as polyurethane resin, is used as a core material, the formation of the foam involves a chemical reaction that is greatly affected by various factors such as temperature, so it is necessary to set uniform conditions and maintain a certain temperature. It was hoped that a device that could respond to changes would emerge. In addition, some manufacturing equipment that has been used in the past simply has an embossing machine interposed between an uncoiler and a molding machine, but there are many cracks on the uneven pattern surface after processing, and the weather resistance and corrosion resistance are poor. , and had the disadvantage of poor appearance. Furthermore, since this kind of equipment that has been used in the past has a manufacturing process using a simple straight line, the plastic foam raw material is supplied from the back side of the front material or the back material, making it easy to spread and disperse the raw material. Nakatsuta. In order to eliminate these drawbacks, the present invention prevents cracks, peeling, cracks, and scratches that occur in the decorative coating during embossing by heating a thin metal plate wound into a coil and then embossing it. , and after releasing the residual strain during embossing, it is greatly curved inward and inverted, then the thin metal plate is formed into a specified shape, heated to approximately 50 to 90 degrees Celsius, and then plastic foam is formed. At the same time as raw materials are discharged, the facing material is laminated, and this is sent to the cure oven to smoothly form a sandwich board with a predetermined cross-sectional structure.
In addition, the present invention proposes an apparatus for manufacturing sand german boards that can be manufactured continuously and economically. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the sandwich board manufacturing apparatus according to the present invention will be described in detail below with reference to the drawings. 1st
The figure is a schematic configuration diagram of the above device, where 1 is a pedestal and 2
Constructed into a story structure, the embossing line 2 on the second floor and the compounding line 21 on the first floor are installed on almost the same center line, and an inverted part 16 is formed at one end between the second floor and the first floor. This is what I did. To explain further, the embossing line 2 includes a thin metal plate feeding section (hereinafter simply referred to as the feeding section) 3, a first loop section 6, a heater section 7 , 10 a pinch roller, 11 an embossing roll, and 12 an enlarged drawing. 13 is a leveler, 14 is a tensioning pinch roller, and 15 is a check part, which are arranged in a straight line. To explain in more detail, the feeding section 3 is the uncoiler 4.
and a pinch roller 5, a flat metal thin plate (having a decorative coating such as a decorative coating or a decorative film) A wound into a coil is attached to the first loop portion 6 at all times without any force. It is for sending. The first loop portion 6 is a thin metal plate A (hereinafter simply referred to as a coil) in the heater portion 7 and subsequent steps in the next process.
This functions to control speed differences and deviations that occur during transfer by loosening the coil A, and to prevent large shocks from being applied to the coil A fed from the feeding section 3. The heater section 7 is composed of a pinch roller 8 that also serves as a guide and a heater 9, and the pinch roller 8 is an upper and lower roller 8.
Coil A is held between a and 8b only at the start of the line, and thereafter it is used as a mere guide roller.
is fed to the heater 9. In addition, the heater 9 heats the decorative coating of the coil A, in fact the coil A itself, to about 30 to 60°C to soften the decorative coating, and prevents the decorative coating from peeling off from the steel plate during embossing, cracking, and scratches. This is to prevent cracks from occurring. The heating method is one of a hot air method, an open flame method, and a hot wire method. Further, the pinch roller 10 feeds the coil A to the embossing roll 11 at a predetermined speed, and functions as a brake against the movement of the coil A during embossing. Embossing roll 1
1, a pattern consisting of male and female uneven parts is formed on the outer peripheral surface, and a desired pattern is applied to the coil A by meshing the upper and lower rolls 11a and 11b, and the gaps of the upper and lower rolls 11a and 11b are formed with uneven parts. part height,
This is determined by the thickness of the coil A. Further, the enlarged depiction section 12 immediately enlarges and depicts cracks, etc. on the decorative coating surface of the coil A' immediately after embossing, and monitors the embossing state. Enlargement can be done using a single lens or a video camera. This is done by The leveler 13 corrects the residual strain existing in the embossed _{coil A} ' _, and as shown in an enlarged extract in FIG _. ), lower rollers 13b ₁ , 13b ₂ ,
13b ₃ ,...13bn (up to 13b ₄ is shown in the figure) are arranged in a zigzag pattern, and the upper roller group 13a
The gap G between the lower roller group 13b and the lower roller group 13b can be adjusted. The tensioning pinch roller 14 rotates faster than the embossing roll 11 , so that the coil A is passed through the processes of the embossing roll 11 and the leveler 13 while being stretched (under tension). Of course, it is provided as necessary. Check part 15 is a coil
This is the zone where the erased state of residual strain in A', cracks in the decorative coating due to embossing, etc. are checked before moving on to the next process. Next, the reversing section 16 described above transfers the coil A' from the second floor to the composite line 2 on the first floor.
1 and to make the front surface of the coil A' the back side. It is made up of a guide roller group 17 and a curved guide plate 18, and the guide roller group 17 is brought into contact with each other by a switch (not shown). It can be moved or released. The curved guide plate 18 is a flat plate with guide pieces 18a provided on both sides, and 19 is a sensor that speeds up the feeding of the coil A' when the coil A' reaches a certain height. Reference numeral 20 denotes a second loop portion, which extends from the curved guide plate 18 to a composite line 21.
A coil A' is looped in the zone between the lines and functions as a relief between the embossing lines 2 and 2. In addition, the composite line 21 includes a molding machine 22 that molds the embossed coil A' into an arbitrary shape;
Preheater 23, pinch roller 24, discharge section 2
5. Back material B guide 26, Cure oven 3
1. Cutters 43 are arranged in a straight line. To explain in more detail, the molding machine 22 is a coil
A′ in single or double width (not shown)
For example, the coil A' is formed as shown in FIGS. 3a to 3h, and the preheater 23 heats the coil A' to 50 to 90°C. In addition, the discharge section 25 applies the self-adhesive foamable reaction mixture P (hereinafter simply referred to as the mixture) to the back side (one side) of the coil A'. It is intended to be supplied either by airless) or by injection method. Note that as the mixture P, a thermosetting foamable synthetic resin is used. Furthermore, the guide 26 is made of one or two types of backing material B wound around an uncoiler 27 mounted on the frame 1 on the second floor, such as coil, asbestos paper, kraft paper, aluminum foil, plastic sheet, asphalt felt, etc. This is for guiding the laminated product above onto the mixture P, spreading the mixture P, and laminating the mixture P. To explain further, the guide 26 guides the backing material B onto the coil A', and determines the timing for bringing the backing material B into contact with the mixture P depending on the state of the mixture P (so-called self-adhesion of the mixture). It has the function of making more effective use of the properties of the mixture) and evening out the uneven dispersion of the mixture P. Its structure includes one roller or the structure shown in FIGS. 4a to 4e. That is, in figure a, the rollers 26a ₁ , 26
a ₂ ,... guide arranged in parallel at the same height, b
Figures and c are coiled rollers 26a ₁ ,...26an.
A guide in which rollers are arranged at a certain angle θ with respect to the traveling direction of A', a guide in which a boat-shaped spreading plate 28 is interposed between the rollers 26a ₁ , . The figure shows a guide in which rollers 26 are arranged between a gap regulating plate/spreading plate 28a and a roller group 29 as shown in figure a. Further, the detector 30 detects cutting, damage, etc. of the back material B, and accordingly generates a signal to stop the operation of the discharge section 25. The principle behind this is a detector that uses electricity, magnetism, heat, and tension differences. The cure oven 31 described above transports the mixture P with the mixture P interposed between the coil A' and the backing material B, reacts and foams the mixture P in a favorable environment, and creates a sandwich plate S having a predetermined thickness.
It is to be formed. To explain more specifically, the cure oven 31 is composed of a mold 32 and a cover 42, and the mold 32 has a steel belt or a caterpillar, for example, interposed between the driving elements 33, 34 and the driven elements 35, 36, and the upper and lower mold members thereof. Reinforcing rollers 39 are arranged on the back surfaces of the reinforcing rollers 37 and 38, heating devices 40 and 41 are provided on the back surfaces of the reinforcing rollers 39, and a space containing all of these shapes is sealed with a cover 42. To explain further, the reinforcing roller 39 prevents the upper and lower mold members 37 and 38 from deforming due to the foaming pressure of the mixture P, and
1 is for keeping the inside of the mold at a temperature of 50 to 90°C to complete the reaction of the mixture P within a predetermined time and to exhibit predetermined physical properties. In addition, the cover 42 keeps the inside of the mold warm and prevents trichloromonofluoromethane released during the reaction of the mixture P, carbon dioxide gas, carbon monoxide, etc. released from the heating device into the working environment for safety and hygiene reasons. ,
This is to obtain a more effective heat retention effect. Note that only the inlet and outlet portions 32a and 32b of the mold 32 are structured to prevent leakage of gas within the mold 32 to the maximum extent possible. Further, the cutter 43 is used to cut the composite belt S having a sandwich structure into a predetermined length while the belt is running. Next, a method for manufacturing a sanderch board using the sanderch board manufacturing apparatus according to the present invention will be described. First, the coil A is attached to the uncoiler 4, and the coil A is sequentially attached to the loop portion 6 via the pinch roller 5.
send. Next, the coil A passes through the loop section 6, is guided by the guide/pinch roller 8 of the heater section 7 , and is fed to the heater 9. Note that the pinch roller 8 functions as a pinch roller only when the coil A reaches the pinch roller 10 for the first time, and after that, the upper roller 8a rises and the lower roller 8b
acts simply as a guide roller. Next, the coil A sent to the heater 9 is approximately 30
The decorative coating film is heated to ~60°C to soften it to a predetermined hardness, and then is fed to an embossing roll 11 via a pinch roller 10. To explain further, if embossing is performed without heating the coil A or with the coil A being heated too much, the decorative coating will peel, crack, be damaged, crack, shrink, etc. In other words, if the decorative coating film of coil A is not heated, the above-mentioned development will occur due to deformation (processing) that exceeds the elasticity of the decorative coating film, and if the heating temperature is increased to 60° or higher, the cosmetic coating film will deteriorate. This is because the resin content approaches its softening point and the adhesive strength between the coil A and the decorative paint film decreases, which may cause the decorative paint film to peel off from the coil A, shrink, or lack scratch resistance. . Also, increase the heating temperature to about 30
If the temperature is below ℃, the resin content of the decorative coating will lose its softness and increase its hardness, which may cause the cosmetic coating to crack or crack.
This is because the scratch resistance is greatly reduced. Next, the coil A leaving the pinch roller 10 is subjected to an embossing roll 11 to form a continuous embossed pattern consisting of a concave portion α and a convex portion β as shown in FIG. 5, for example. The coil A' that has left the embossing roll 11 is fed to the leveler 13 through the enlarged drawing section 12. The enlarged drawing section 12 transmits the occurrence of cracks in the decorative coating film caused by embossing to a control center (not shown) by electric transmission, and operates while monitoring the state. Next, the coil A' that has passed through the enlarged drawing section 12 is corrected by a leveler 13 to remove residual strain during embossing while being stretched by a tensioning pinch roller 14, and then sent to a reversing machine 16. be. Coil passed through reversing machine 16
A' is fed to the compounding line 21 on the first floor via the second loop section 20 where the level sensor 19 is present. Therefore, coil A′ is
2 into a cross section as shown in FIGS. 3a to 3h, and fed to the preheater 23.
The preheater 23 heats the coil A' to approximately 50 to 90°C, and heats it to the mold 32 via the guide/pinch roller 24.
The water is fed to the inlet 32a of the inlet 32a. Further, from the discharge part 25, the mixture P in the middle of reaction and foaming is sent to the coil.
The material B is discharged onto the back surface of A', and the back material B is guided and laminated thereon via the guide 26. Note that the discharged mixture P is spread by the guide 26 and is regulated to a certain thickness. Next, in the mold 32, the mixture P reacts and foams, changing from cream time to gel time to rise time, and sandwich panels S having a shape as shown in FIG. 6 are continuously sent out from the outlet 32b. . Next, the sandwich plate S is cut into a predetermined length using a cutter to produce a product. What has been described above is only one embodiment of the sandwich board manufacturing apparatus according to the present invention, and FIGS.
It can also be formed as shown in FIGS. 8b and 8a to 8c. That is, FIG. 7a shows the upper and lower mold members 3.
7 and 38 are configured by a group of rollers, and Figure b shows a configuration in which the mixture P is discharged onto the back material β. In addition, Figures 8a to 8c show the shape of coil A, and it is possible to manufacture a sanderch board using coil A, which has a simple plate shape as shown in figure a, and a simple gutter shape as shown in figures b and c. You can also do it. As described above, according to the sanderch board manufacturing apparatus according to the present invention, since the decorative coating film is heated to 30 to 60°C for the coil having a decorative coating film on the surface, an arbitrary uneven pattern can be formed on the decorative coating film. Can be embossed without cracking, flawing, peeling, cracking, or shrinking. During embossing, a constant tension is applied to the coil, so the uneven pattern does not shift during embossing, and a beautiful uneven pattern can be formed. Residual strain during embossing can be easily removed by passing it through a leveler, so there is no twisting or twisting. Loops are provided on each of the embossed line and composite line, allowing for smooth connections between lines. This is natural since the coil is reversed by drawing a U-shaped locus. The two-story structure allows the line to be made more compact. Since the coil was heated and the mixture was then discharged, the mixture could be reacted and foamed in a good condition, and a core material with a uniform foam structure could be formed between the coil and the back material.
Since the inside of the mold is sealed, heat retention is improved, and leakage of harmful gases and combustion gases into the working environment is reduced, greatly improving worker safety and hygiene. Since the timing of contact between the back material and the mixture can be easily and freely selected, the upper base material can be reliably bonded and the strength of the sanderch board can be greatly improved. It has the following characteristics.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing one embodiment of the sander plate manufacturing apparatus according to the present invention, Fig. 2 is a perspective view showing a leveler, Figs. Figures a to e are explanatory diagrams showing an example of a guide, Figure 5 is a perspective view showing an example of an uneven pattern formed by embossing, and Figure 6 is a guide manufactured by the manufacturing apparatus according to the present invention. Cross-sectional views showing an example of a sanderch board, Figures 7a and b, and Figure 8
Figures a to c are explanatory diagrams showing other embodiments. 1... Frame, 2... Embossing line, 7...
...Heater part, 11... Emboss roll, 16...
Reversing section, 21... Composite line, 22... Molding machine, 31... Cure oven, 32... Mold.

Claims (1)

[Claims] 1. In an apparatus for manufacturing sanderch boards in which a core material made of synthetic resin foam is interposed between the front material and back material made of thin metal sheets, a device for feeding thin metal sheets to the second floor of a two-story frame is used. A thin metal plate feeding section consisting of an uncoiler and a pinch roller, and storing the thin metal plate fed from the feeding section in a slack state,
A first loop part that adjusts the process before and after the process, a heater part that heats the thin metal plate to 30 to 60 degrees Celsius, a pinch roller that also serves as a guide and is placed after the heater part, and the metal that is sent out from the roller. An embossing roll that creates a desired uneven pattern on a thin plate, a leveler placed after the roll, and an embossing line arranged in a straight line in that order, and an inversion process that bends the metal thin plate fed from the leveler greatly inward and reverses it. a second loop section that loops the thin metal sheet fed from the reversing section, a forming machine that forms the thin metal sheet into a predetermined shape, and a preheater that heats the formed thin metal sheet to 50 to 90°C. , a discharge section that discharges a plastic foam raw material that is in the process of reacting and foaming with the thin metal plate sent out from the preheater or the heated backing material;
A cure oven having a guide that guides and places the backing material on a thin metal plate, a mold that conveys the raw material with it interposed between the thin metal plate and the backing material, reacts and foams the raw material, and regulates it into a predetermined shape. and,
In addition to linearly arranging cutters for cutting sanderch panels sent out from the cure oven into regular lengths, there is also a compounding line installed on the first floor almost directly below the line, and the thin metal plates are cut in a roughly U-shape. A sanderch board manufacturing device characterized by smoothly and continuously performing embossing and integration with other parts while moving along a trajectory.